Air delivery duct



FIG. 1 is a perspective view of an air delivery duct showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a rear elevational view thereof; and

FIG. 8 is a perspective view thereof, with the flexible center section shown bent into a curved position.

The lower tubular portion is shown broken-away in the views to indicate indeterminate length. 

The ornamental design for an air delivery duct, as shown and described. 